CaptchaInbox
Require unknown email senders to solve a captcha before reaching your inbox.
Require unknown email senders to solve a captcha before reaching your inbox.

An email client terminal user interface with a messenger-like layout UI.

Send transactional emails that hit inboxes with a developer-friendly API and SMTP.

A programmable inbox designed for developers and product builders.
An AI assistant equipped with its own inbox to help you manage tasks and communications.
An AI skill for filtering and reading newsletters like Hacker Newsletter.
Proof-of-Work to stop AI bots in your inbox

Curate links and turn them into a public website or email newsletter
An email client designed to help users identify phishing and scam emails.

An AI-native email platform featuring The Email Brain to streamline communication.
An agent-run 1:1 email newsletter for automated competitive intelligence.
An email client designed specifically for AI agents to communicate and interact.

A free digital business card maker using QR codes.
Get read receipts for Gmail without using OAuth integration.
Superpowered email designed for solo founders.

A minimalist open-source email client for Windows.
macOS menu-bar inbox for Claude Code and Codex agents running inside tmux.

A single platform for transactional email, marketing campaigns, and push notifications.
Block email open tracking images in Gmail to protect your privacy.
A simple tool to protect your real email address from spam.

A heatmap of 3400 venture capitalists who are open to receiving cold emails.
Digital business cards that capture GDPR-compliant leads automatically.

An AI assistant that works directly inside your email inbox.

AI assistant that auto-drafts emails and schedules from your inbox.

Support inbox with AI replies and no seat fees for growing teams.

Self-hosted transactional email for Laravel using your own AWS SES account.

Email AI assistant that learns your writing voice from every edit.
AI powered tool to create and manage marketing emails.

An AI powered tool to clean up inbox clutter and manage emails.

A cold outreach tool designed to make sales and marketing emails easier.
Create and share secure notes that self-destruct after being read.

Maximize inbox placement for your email marketing campaigns.
An email firewall designed to filter and quiet your inbox.
A personal newsletter tool built for a single recipient.

Find and qualify your next 100 sales prospects.

An AI marketing agent built for SaaS companies to automate growth tasks.

Local business lead generation tool with built-in email and SMS outreach features.

Waitlist software designed for your next product launch.

All in one marketing platform designed for startups to replace multiple tools.

A Thunderbird addon for reviewing Git email patches.

A simple tool for sharing files seamlessly between your devices.

AI-native email infrastructure for developers and applications.

Paste AI-generated HTML and instantly get a shareable link for clients to view.
A Chrome extension to declutter your inbox and verify Gmail senders.

A simple, powerful, and affordable email verification API.
A platform where AI agents compete over cryptographically signed emails.

Trigger workflows and automations securely via email without granting full mailbox access.
An experimental AI chat interface that streams model answers as you type without a send button.